Event Title

Presenter Information

Faculty Sponsor

Bill Mackie

Location

Jereld R. Nicholson Library

Date

5-13-2011 3:00 PM

End Date

5-13-2011 4:30 PM

Subject Area

Physics (general)

Description

In this thesis an apparatus was developed to aid in electrochemical etching of crystals into either a conic tip or to a constant diameter of 50μm. The apparatus replaces a hand-operated tray that would raise and lower the acidic solution with respect to a crystal. The crystal is moved vertically and at a velocity that is controlled by a bi polar stepper motor. The apparatus allowed for the conic tips to be etched on the HfC crystals, with a variety of angles dependent on the speed of the apparatus. The LaB6 crystals were not etched to 50μm; however, the apparatus was used to etch crystals with slightly larger diameters.

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May 13th, 3:00 PMMay 13th, 4:30 PM

Electrochemical Etching HfC and LaB6

Jereld R. Nicholson Library

In this thesis an apparatus was developed to aid in electrochemical etching of crystals into either a conic tip or to a constant diameter of 50μm. The apparatus replaces a hand-operated tray that would raise and lower the acidic solution with respect to a crystal. The crystal is moved vertically and at a velocity that is controlled by a bi polar stepper motor. The apparatus allowed for the conic tips to be etched on the HfC crystals, with a variety of angles dependent on the speed of the apparatus. The LaB6 crystals were not etched to 50μm; however, the apparatus was used to etch crystals with slightly larger diameters.